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Rotor pumps are more advantageous than gear pumps and sliding vane pumps in conveying high-viscosity media. The process of oil transportation and storage pipeline generally has single pipe system, double (multi) pipe system, independent pipe system and other forms. Rotor pump due to the high temperature and high viscosity of the polymer melt conveyed, the rotor pump structure design has the following characteristics:
1. Rotor pump asymmetric double unloading tank to eliminate the danger of liquid trapping; spiral self-priming high-pressure lubrication to ensure good bearing lubrication. The gear and shaft of the rotor pump are integrated gear shafts, which have a compact structure and are easy to assemble. The bearing lubrication adopts spiral self-priming high-pressure lubrication. The high-pressure polymer melt on the discharge side passes through the holes in the bearing and enters the bearing from the bottom of the bearing. The spiral groove is used to achieve the purpose of lubricating the entire bearing. Back to the hole slot. Suction into the suction chamber of the pump. Its characteristics are that it can obtain sufficient lubricating fluid flow, which has a good lubricating effect on the bearings, can improve the self-priming performance of the pump, and avoid the phenomenon of suction, but it increases the leakage of the pump and causes a slight loss of volumetric efficiency.
2. Rotor pump double end mechanical seal to avoid axial leakage. The shaft seal device of the rotor pump adopts a double-end mechanical seal, which changes the leaky axial seal into a static seal and an end face seal that are more difficult to leak, preventing air from entering the pump and polymer melt from leaking. The seal is reliable and can be used. The requirements of long service life, low frictional power loss, no wear of the shaft or sleeve, vibration sensitivity of the rotating shaft, and sensitivity of the shaft to the deflection of the pump body hole.
3. Rotor pump jacketed pump body with good thermal insulation; wide mouth entrance reduces radial force. The pump body of the rotor pump is a three-piece combined structure. Because the polymer melt is in a high temperature melting state, the pump must be able to maintain good heat to prevent the polymer solution from cooling and solidifying. Therefore, the three components of the pump body are jacketed. The liquid or gas heat medium makes the whole pump uniformly heated and kept warm. There is negative pressure at the population of the pump, and the high viscosity of the polymer melt makes the radial force acting on the gear journal and bearing very large, which hinders the performance of the pump and affects the service life of the pump. Therefore, the wide mouth population is adopted to expand the low pressure area to reduce the radial force, extend the service life, and improve the self-priming capacity of the pump.
If you are interested in or have questions about our Rohde Rotary Rotor Pumps , please call our 24-hour free customer service hotline: 400-800-5717.
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